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TI-2026-32770 Aliases CVE-2026-44895GHSA-8jr5-6gvj-rfpf

GitLab MCP Server: SSE transport has no authentication and wildcard CORS, exposing all GitLab tools

Priority HIGH 81CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-306.

Summary

GitLab MCP Server lets an AI agent talk directly to GitLab. Prior to 0.6.0, the HTTP transport in src/transport.ts ships with no authentication layer at all and a wildcard Access-Control-Allow-Origin: * on every response. The structural defect is that the SSE server stands up a stateful, mutation-capable RPC endpoint that is backed by the operator's GITLAB_PERSONAL_ACCESS_TOKEN without any inbound credential check, then advertises itself to every cross-origin browser context via the wildcard CORS header. The httpServer.listen(port) call at line 97 also passes no host argument, so the bind defaults to 0.0.0.0 and exposes the auth-less surface on every interface. This vulnerability is fixed in 0.6.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00445 38th percentileScored 2026-11-07
Fix Fixed mcp-gitlab-server (yoda-digital): 0.6.0@yoda.digital/gitlab-mcp-server (npm): 0.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
yoda-digitalmcp-gitlab-serverbefore 0.6.00.6.0Patch availableCNA
—@yoda.digital/gitlab-mcp-server (npm)before 0.6.00.6.0Patch availableGHSA-8jr5-6gvj-rfpf
  • mcp-gitlab-server Vendoryoda-digital Affected before 0.6.0 Fixed in 0.6.0 Patch available CNA
  • @yoda.digital/gitlab-mcp-server (npm) Vendor— Affected before 0.6.0 Fixed in 0.6.0 Patch available GHSA-8jr5-6gvj-rfpf

Remediation

  • Fix · CNA mcp-gitlab-server (yoda-digital) Fixed in 0.6.0
  • Fix · GHSA-8jr5-6gvj-rfpf @yoda.digital/gitlab-mcp-server (npm) Fixed in 0.6.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44895
  2. 2026-10-03 Alias added: GHSA-8jr5-6gvj-rfpf

References

Advisory 1

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences